package Sl;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Sl07 {

    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
        Class clz=Class.forName("Sl.Person");
        //获取Person的无参构造方法：public Person()
        Constructor cl=clz.getDeclaredConstructor();
        //Person的无参构造为public，这里可以直接访问
        Object obj=cl.newInstance();
        System.out.println(obj);

        //获取Person的单参构造：private Person(String)
        Constructor c2=clz.getDeclaredConstructor(String.class);
        //Person的单参构造为private,这里已超出其访问范围，不能直接访问
        //通过setAccessable方法，设定为可以访问
        c2.setAccessible(true);
        obj=c2.newInstance("New Person");
        System.out.println(obj);

        //获取Person的三参构造：protected Person(String,String,String)
        Constructor c3=clz.getDeclaredConstructor(String.class,String.class,String.class);
        //Person的三参构造为protected，这里已超出其访问范围，不能直接访问
        //通过setAccessable方法，设定为可以访问
        c3.setAccessible(true);
        obj=c3.newInstance("New Person","beijing","Hello!");
        System.out.println(obj);
    }
}
